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using System;
using System.Collections.ObjectModel;
using NUnit.Framework;
namespace Xamarin.Forms.Core.UnitTests
{
[TestFixture]
public class FormattedStringTests : BaseTestFixture
{
[SetUp]
public override void Setup ()
{
base.Setup ();
Device.PlatformServices = new MockPlatformServices ();
}
[TearDown]
public override void TearDown ()
{
base.Setup ();
Device.PlatformServices = null;
}
[Test]
public void NullSpansNotAllowed()
{
var fs = new FormattedString();
Assert.That (() => fs.Spans.Add (null), Throws.InstanceOf<ArgumentNullException>());
fs = new FormattedString();
fs.Spans.Add (new Span());
Assert.That (() => {
fs.Spans[0] = null;
}, Throws.InstanceOf<ArgumentNullException>());
}
[Test]
public void SpanChangeTriggersSpansPropertyChange()
{
var span = new Span();
var fs = new FormattedString();
fs.Spans.Add (span);
bool spansChanged = false;
fs.PropertyChanged += (s, e) => {
if (e.PropertyName == "Spans")
spansChanged = true;
};
span.Text = "New text";
Assert.That (spansChanged, Is.True);
}
[Test]
public void SpanChangesUnsubscribes()
{
var span = new Span();
var fs = new FormattedString();
fs.Spans.Add (span);
fs.Spans.Remove (span);
bool spansChanged = false;
fs.PropertyChanged += (s, e) => {
if (e.PropertyName == "Spans")
spansChanged = true;
};
span.Text = "New text";
Assert.That (spansChanged, Is.False);
}
[Test]
public void AddingSpanTriggersSpansPropertyChange()
{
var span = new Span();
var fs = new FormattedString();
bool spansChanged = false;
fs.PropertyChanged += (s, e) => {
if (e.PropertyName == "Spans")
spansChanged = true;
};
fs.Spans.Add (span);
Assert.That (spansChanged, Is.True);
}
[Test]
public void ImplicitStringConversion()
{
string original = "fubar";
FormattedString fs = original;
Assert.That (fs, Is.Not.Null);
Assert.That (fs.Spans.Count, Is.EqualTo (1));
Assert.That (fs.Spans[0], Is.Not.Null);
Assert.That (fs.Spans[0].Text, Is.EqualTo (original));
}
[Test]
public void ImplicitStringConversionNull()
{
string original = null;
FormattedString fs = original;
Assert.That (fs, Is.Not.Null);
Assert.That (fs.Spans.Count, Is.EqualTo (1));
Assert.That (fs.Spans[0], Is.Not.Null);
Assert.That (fs.Spans[0].Text, Is.EqualTo (original));
}
}
}
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